+ Do you have questions regarding the impacts and implementation of the 15-minute imbalance settlement period? RTE has set up an FAQ page to guide you.
- Market participants
Context of this evolution
The French balancing model is largely based on Balance Responsible Parties (BRP), in conjunction with RTE which is in charge of ensuring the physical balance. All market participants wishing to participate in the French market must designate a BRP. The latter undertakes to settle the costs resulting from imbalances, subsequently observed, between generation and consumption on its perimeter, as part of the Balance Responsible Party system.
The imbalance settlement period (or ISP) corresponds to the time granularity at which imbalances are calculated and settled. This interval thus reflects the time granularity at which BRPs are required to be balanced. Historically specific to each country, it is currently 30 minutes in France. Commission Regulation 2017/2195 “Guideline on Electricity Balancing” (EBGL) provides for the harmonisation of the ISP to 15 minutes. In its deliberation of 14 November 2018, the CRE granted a derogation until 1 January 2025 for its implementation in France.
This evolution is part of a generalised transition to the reference time interval of 15 minutes for many processes of the power system. The transition of the imbalance settlement period to 15 minutes is the first step in the process, taking place alongside two other major developments in the power system: the implementation of 15’ products on markets and the transition to 96 scheduling gates in France.
Impacts and major deployment steps
Given the central role of the BRP system in the organisation of the power system, the upcoming change in the imbalance settlement period time granularity has consequences on a wide range of areas, including: system operator metering systems, the profiling system, flow reconstruction, block exchange (PEB), adaptation of different market mechanisms (balancing mechanism, scheduling, frequency ancillary services, NEBEF, mFRR-RR, capacity mechanism), and more generally publications and exchanges between market players.
The following guiding principles, resulting from the consultation conducted in 2019, have been applied to precisely define the scope of the changes impacted and the trajectory of implementation:
- Use the entire derogation granted by the CRE until 1 January 2025;
- There should be no extrapolation for the imbalances chain calculation: all of the inputs related to interval calculation must be made compatible with a 15-minute interval;
- Limit any changes related to side effects from other processes: only developments due to the change in imbalance settlement period time granularity are dealt with in the framework of the ISP15 project (for example, the transition to 15-minute market products in day-ahead and intraday markets is dealt with in the framework of the European projects SDAC and SIDC).
Regarding the trajectory, a gradual deployment of the switching of the various systems between T2 2024 and T1 2025 was preferred to a "big bang" deployment.
Changes brought to data exchanges with RTE and technical documentation
To facilitate the consideration of the impacts of the transition to the 15-minute imbalance settlement period for all users of our services, RTE provides a description of the changes and the applicable technical documentation for the impacted services. Below you will find these elements according to type of market participant and theme.
Changes to the metering of sites connected to the Public Electricity Transmission System (PTS)
The previous data is accessible to both BRPs and CART contract holders.
Amendments for Balance Responsible Parties
*The data is also accessible to CART contract holders when at least one of the holder’s sites is concerned.
Amendments for DSOs
Note : from 05 October 2024 (provisional date), load curves will be transmitted via the RMC application (RMC User Guide)
Amendments for Balancing Service Providers and Scheduling Agents
Amendments for Demand Response Aggregators
Changes for Reserve Providers
Documentation for the reserve providers is currently being drafted.
Changes to public data made available by RTE
*Data available up to 04/10/2024 application date.
Capacity Mechanism amendments
Documentation for the capacity mechanism is currently being drafted.
Please contact your account manager for any additional information on amendments related to the transition of the imbalance settlement period to 15’. For any technical issues relating to the operational implementation, contact RTE at: email@example.com